| sparkle(noun, force, quality, character, strength) |
| spine(noun, drive, strength, energy, resolve) |
| starch(noun, strength, spirit, determination, courage) |
| staying power(noun, expression, strength, spirit, determination) |
| stick-to-it-iveness |
| stick-to-itiveness(noun, strength, determination, courage, firmness) |
| stiff upper lip(noun, expression, idiom, drive, energy) |
| stomach(noun, strength, determination, courage, firmness) |
| stoniness(noun, resolution) |
| stoutness |
| strong will(noun, expression, spirit, determination, firmness) |
| substance(noun, force, quality, character, strength) |
| temerity(spirit, dash, courage, nerve, liveliness) |
| temper(noun, force, quality, character, strength) |
| temperament(noun, force, quality, character, strength) |
| tenor(noun, force, quality, character, strength) |
| tirelessness(noun, resolution) |
| true grit(noun, expression, strength, determination, courage) |
| trueness(noun, resolution) |
| valorousness(noun, strength, determination, courage, firmness) |